Jakub Jelen reported at Fedora that "nc -l 8080" (terminal #1) and "echo XXX | nc localhost 8080" (terminal #2) keeps hanging both client and server after reading the EOF, even the last sentence of "CLIENT/SERVER MODEL" in the man page of nc(1) says "The connection may be terminated using an EOF (‘^D’)."
Based on Freenode #openbsd IRC the observed behaviour is correct but the man page should be updated, so my proposal is posted below. As I'm not sure if -N should be added to 'server' and 'client' side, I've cloned the "DATA TRANSFER" section, which covers the 'client' side only. Feel free to adjust my proposal as necessary. Thanks, Robert --- nc.1 2020-02-12 14:46:36.831500390 +0000 1.95 +++ nc.1 2021-03-30 02:22:34.545148296 +0200 @@ -414,7 +414,7 @@ .Pq or a second machine , connect to the machine and port being listened on: .Pp -.Dl $ nc 127.0.0.1 1234 +.Dl $ nc -N 127.0.0.1 1234 .Pp There should now be a connection between the ports. Anything typed at the second console will be concatenated to the first, @@ -427,7 +427,10 @@ .Sq client . The connection may be terminated using an .Dv EOF -.Pq Sq ^D . +.Pq Sq ^D +if the +.Fl N +flag was given. .Sh DATA TRANSFER The example in the previous section can be expanded to build a basic data transfer model.
